The Harry Potter and Beauty and the Beast star was accompanied by friend Marai Larasi, the executive director of Imkaan, a U.K.-based women's organization "aimed at responding to and preventing violence against black minoritized women and girls." Watson and several other actresses brought gender and racial justice advocates as their plus-ones to the Golden Globes to show their solidarity for each other and support of victims of sexual harassment and assault.

"We've been working together this year and when Michelle Williams spearheaded the idea of actresses bringing activists on the red carpet, my first thought was, 'It would be so great to do it with Marai, because we have fun together, we challenge each other," Watson told E! News' Ryan Seacrest.

"We do," Larasi said. "Solidarity, mutual respect."

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"There's something about in women in Hollywood speaking out," she said. "There is a wall of silence around violence against women and girls and every time somebody speaks out, it just creates a bit of a crack in that wall."

She said women in Hollywood "have an opportunity to amplify the issues and shine a light on things."

Celebs have been promoting the anti-sexual misconduct fundraising campaign Time's Up. Watson, Larasi and many others wore black to the Golden Globes to show their support for the initiative.